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Finding the Fourth Proportional to 20,646.61, 30,959.43 and 8,795.80

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Solution

The fourth proportional to 20,646.61, 30,959.43 and 8,795.80 is: 13,189.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,646.61 : 30,959.43 = 8,795.80 : x
  2. Step 2: Convert to fraction form
    20,646.61/30,959.43 = 8,795.80/x
  3. Step 3: Cross multiply
    20,646.61x = 30,959.43 × 8,795.80
  4. Step 4: Simplify right side
    20,646.61x = 272,312,954.39
  5. Step 5: Solve for x
    x = 272,312,954.39/20,646.61
  6. Step 6: Final answer
    x = 13,189.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.